[Elecraft] K2 Frequence Drift

[Ron D'Eau Claire]

And, if you don't want to twiddle the main tuning knob during the QSO, be
sure to let the rig warm up for 15 minutes or so first. Most people don't
bother but simply adjust the main tuning (not the RIT) as needed during the
warm-up period to keep the K2 on frequency. 

If it seems to happen to you after your K2 is fully warmed up, suspect the
OTHER station's transmitter is drifting. Most rigs move frequency a bit
during the warm-up period.

A good way to assess our K2's stability without exotic equipment is to tune
in WWV at 10 MHz in CW mode, using SPOT to zero beat the carrier when the
tones are not present. You can see how much drift occurs from cold start and
check to see if it's stable after a warm-up period since WWV's frequency is
very, very stable.

73, 

Ron AC7AC

-----Original Message-----

Jason,

The K2 specification for drift is less than 100 Hz from a cold start at 
25 degC.  50 Hz is well within that specification.

I would suggest you do the dial calibration procedure after the K2 has 
warmed up.
I highly recommend the procedure on my website www.w3fpr.com - article 
on K2 Dial Calibration.
I would suggest a 15 minute warm-up period is about right.

73,
Don W3FPR

On 12/27/2011 4:10 PM, Jason Morgan wrote:
> Hello everyone... I know that this has been kicked around on the reflector
quite a bit but it is new to me and trying to read through all of the
information is a daunting task.
>   
> I just finished building my k2/100 in November.  I have not noticed this
problem before but I have not had the opportunity to use is that much
either.
>   
> Today when talking to a friend on 7.219.00MHz LSB I noticed that he began
to drift off freq.  Because he was mobile I did not think that much about
it.  As we continued our conversation I found that when I turned on the RIT
and listened on 7.218.95 he sounded "on freq" again.  When I questioned him
about it he told me that he thought I was off freq as well.  I turned off
the RIT and tuned to 7.218.95 and he told me that I was right on freq again.
The drift was obvious and stopped exactly .05 down from where we started.  I
switched radios and we continued our conversation on 7.219.00.  When I
turned the K2 back on and transmitted with it the exact same thing happened
as before. As the radio warmed up it drifted down .05.
>   
> Any help you can offer would be appreciated.
>   
> 73
> K4SHP
>
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html